| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * Driver for the National Semiconductor DP83640 PHYTER |
| * |
| * Copyright (C) 2010 OMICRON electronics GmbH |
| */ |
| |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #include <linux/crc32.h> |
| #include <linux/ethtool.h> |
| #include <linux/kernel.h> |
| #include <linux/list.h> |
| #include <linux/mii.h> |
| #include <linux/module.h> |
| #include <linux/net_tstamp.h> |
| #include <linux/netdevice.h> |
| #include <linux/if_vlan.h> |
| #include <linux/phy.h> |
| #include <linux/ptp_classify.h> |
| #include <linux/ptp_clock_kernel.h> |
| |
| #include "dp83640_reg.h" |
| |
| #define DP83640_PHY_ID 0x20005ce1 |
| #define PAGESEL 0x13 |
| #define MAX_RXTS 64 |
| #define N_EXT_TS 6 |
| #define N_PER_OUT 7 |
| #define PSF_PTPVER 2 |
| #define PSF_EVNT 0x4000 |
| #define PSF_RX 0x2000 |
| #define PSF_TX 0x1000 |
| #define EXT_EVENT 1 |
| #define CAL_EVENT 7 |
| #define CAL_TRIGGER 1 |
| #define DP83640_N_PINS 12 |
| |
| #define MII_DP83640_MICR 0x11 |
| #define MII_DP83640_MISR 0x12 |
| |
| #define MII_DP83640_MICR_OE 0x1 |
| #define MII_DP83640_MICR_IE 0x2 |
| |
| #define MII_DP83640_MISR_RHF_INT_EN 0x01 |
| #define MII_DP83640_MISR_FHF_INT_EN 0x02 |
| #define MII_DP83640_MISR_ANC_INT_EN 0x04 |
| #define MII_DP83640_MISR_DUP_INT_EN 0x08 |
| #define MII_DP83640_MISR_SPD_INT_EN 0x10 |
| #define MII_DP83640_MISR_LINK_INT_EN 0x20 |
| #define MII_DP83640_MISR_ED_INT_EN 0x40 |
| #define MII_DP83640_MISR_LQ_INT_EN 0x80 |
| |
| /* phyter seems to miss the mark by 16 ns */ |
| #define ADJTIME_FIX 16 |
| |
| #define SKB_TIMESTAMP_TIMEOUT 2 /* jiffies */ |
| |
| #if defined(__BIG_ENDIAN) |
| #define ENDIAN_FLAG 0 |
| #elif defined(__LITTLE_ENDIAN) |
| #define ENDIAN_FLAG PSF_ENDIAN |
| #endif |
| |
| struct dp83640_skb_info { |
| int ptp_type; |
| unsigned long tmo; |
| }; |
| |
| struct phy_rxts { |
| u16 ns_lo; /* ns[15:0] */ |
| u16 ns_hi; /* overflow[1:0], ns[29:16] */ |
| u16 sec_lo; /* sec[15:0] */ |
| u16 sec_hi; /* sec[31:16] */ |
| u16 seqid; /* sequenceId[15:0] */ |
| u16 msgtype; /* messageType[3:0], hash[11:0] */ |
| }; |
| |
| struct phy_txts { |
| u16 ns_lo; /* ns[15:0] */ |
| u16 ns_hi; /* overflow[1:0], ns[29:16] */ |
| u16 sec_lo; /* sec[15:0] */ |
| u16 sec_hi; /* sec[31:16] */ |
| }; |
| |
| struct rxts { |
| struct list_head list; |
| unsigned long tmo; |
| u64 ns; |
| u16 seqid; |
| u8 msgtype; |
| u16 hash; |
| }; |
| |
| struct dp83640_clock; |
| |
| struct dp83640_private { |
| struct list_head list; |
| struct dp83640_clock *clock; |
| struct phy_device *phydev; |
| struct delayed_work ts_work; |
| int hwts_tx_en; |
| int hwts_rx_en; |
| int layer; |
| int version; |
| /* remember state of cfg0 during calibration */ |
| int cfg0; |
| /* remember the last event time stamp */ |
| struct phy_txts edata; |
| /* list of rx timestamps */ |
| struct list_head rxts; |
| struct list_head rxpool; |
| struct rxts rx_pool_data[MAX_RXTS]; |
| /* protects above three fields from concurrent access */ |
| spinlock_t rx_lock; |
| /* queues of incoming and outgoing packets */ |
| struct sk_buff_head rx_queue; |
| struct sk_buff_head tx_queue; |
| }; |
| |
| struct dp83640_clock { |
| /* keeps the instance in the 'phyter_clocks' list */ |
| struct list_head list; |
| /* we create one clock instance per MII bus */ |
| struct mii_bus *bus; |
| /* protects extended registers from concurrent access */ |
| struct mutex extreg_lock; |
| /* remembers which page was last selected */ |
| int page; |
| /* our advertised capabilities */ |
| struct ptp_clock_info caps; |
| /* protects the three fields below from concurrent access */ |
| struct mutex clock_lock; |
| /* the one phyter from which we shall read */ |
| struct dp83640_private *chosen; |
| /* list of the other attached phyters, not chosen */ |
| struct list_head phylist; |
| /* reference to our PTP hardware clock */ |
| struct ptp_clock *ptp_clock; |
| }; |
| |
| /* globals */ |
| |
| enum { |
| CALIBRATE_GPIO, |
| PEROUT_GPIO, |
| EXTTS0_GPIO, |
| EXTTS1_GPIO, |
| EXTTS2_GPIO, |
| EXTTS3_GPIO, |
| EXTTS4_GPIO, |
| EXTTS5_GPIO, |
| GPIO_TABLE_SIZE |
| }; |
| |
| static int chosen_phy = -1; |
| static ushort gpio_tab[GPIO_TABLE_SIZE] = { |
| 1, 2, 3, 4, 8, 9, 10, 11 |
| }; |
| |
| module_param(chosen_phy, int, 0444); |
| module_param_array(gpio_tab, ushort, NULL, 0444); |
| |
| MODULE_PARM_DESC(chosen_phy, \ |
| "The address of the PHY to use for the ancillary clock features"); |
| MODULE_PARM_DESC(gpio_tab, \ |
| "Which GPIO line to use for which purpose: cal,perout,extts1,...,extts6"); |
| |
| static void dp83640_gpio_defaults(struct ptp_pin_desc *pd) |
| { |
| int i, index; |
| |
| for (i = 0; i < DP83640_N_PINS; i++) { |
| snprintf(pd[i].name, sizeof(pd[i].name), "GPIO%d", 1 + i); |
| pd[i].index = i; |
| } |
| |
| for (i = 0; i < GPIO_TABLE_SIZE; i++) { |
| if (gpio_tab[i] < 1 || gpio_tab[i] > DP83640_N_PINS) { |
| pr_err("gpio_tab[%d]=%hu out of range", i, gpio_tab[i]); |
| return; |
| } |
| } |
| |
| index = gpio_tab[CALIBRATE_GPIO] - 1; |
| pd[index].func = PTP_PF_PHYSYNC; |
| pd[index].chan = 0; |
| |
| index = gpio_tab[PEROUT_GPIO] - 1; |
| pd[index].func = PTP_PF_PEROUT; |
| pd[index].chan = 0; |
| |
| for (i = EXTTS0_GPIO; i < GPIO_TABLE_SIZE; i++) { |
| index = gpio_tab[i] - 1; |
| pd[index].func = PTP_PF_EXTTS; |
| pd[index].chan = i - EXTTS0_GPIO; |
| } |
| } |
| |
| /* a list of clocks and a mutex to protect it */ |
| static LIST_HEAD(phyter_clocks); |
| static DEFINE_MUTEX(phyter_clocks_lock); |
| |
| static void rx_timestamp_work(struct work_struct *work); |
| |
| /* extended register access functions */ |
| |
| #define BROADCAST_ADDR 31 |
| |
| static inline int broadcast_write(struct phy_device *phydev, u32 regnum, |
| u16 val) |
| { |
| return mdiobus_write(phydev->mdio.bus, BROADCAST_ADDR, regnum, val); |
| } |
| |
| /* Caller must hold extreg_lock. */ |
| static int ext_read(struct phy_device *phydev, int page, u32 regnum) |
| { |
| struct dp83640_private *dp83640 = phydev->priv; |
| int val; |
| |
| if (dp83640->clock->page != page) { |
| broadcast_write(phydev, PAGESEL, page); |
| dp83640->clock->page = page; |
| } |
| val = phy_read(phydev, regnum); |
| |
| return val; |
| } |
| |
| /* Caller must hold extreg_lock. */ |
| static void ext_write(int broadcast, struct phy_device *phydev, |
| int page, u32 regnum, u16 val) |
| { |
| struct dp83640_private *dp83640 = phydev->priv; |
| |
| if (dp83640->clock->page != page) { |
| broadcast_write(phydev, PAGESEL, page); |
| dp83640->clock->page = page; |
| } |
| if (broadcast) |
| broadcast_write(phydev, regnum, val); |
| else |
| phy_write(phydev, regnum, val); |
| } |
| |
| /* Caller must hold extreg_lock. */ |
| static int tdr_write(int bc, struct phy_device *dev, |
| const struct timespec64 *ts, u16 cmd) |
| { |
| ext_write(bc, dev, PAGE4, PTP_TDR, ts->tv_nsec & 0xffff);/* ns[15:0] */ |
| ext_write(bc, dev, PAGE4, PTP_TDR, ts->tv_nsec >> 16); /* ns[31:16] */ |
| ext_write(bc, dev, PAGE4, PTP_TDR, ts->tv_sec & 0xffff); /* sec[15:0] */ |
| ext_write(bc, dev, PAGE4, PTP_TDR, ts->tv_sec >> 16); /* sec[31:16]*/ |
| |
| ext_write(bc, dev, PAGE4, PTP_CTL, cmd); |
| |
| return 0; |
| } |
| |
| /* convert phy timestamps into driver timestamps */ |
| |
| static void phy2rxts(struct phy_rxts *p, struct rxts *rxts) |
| { |
| u32 sec; |
| |
| sec = p->sec_lo; |
| sec |= p->sec_hi << 16; |
| |
| rxts->ns = p->ns_lo; |
| rxts->ns |= (p->ns_hi & 0x3fff) << 16; |
| rxts->ns += ((u64)sec) * 1000000000ULL; |
| rxts->seqid = p->seqid; |
| rxts->msgtype = (p->msgtype >> 12) & 0xf; |
| rxts->hash = p->msgtype & 0x0fff; |
| rxts->tmo = jiffies + SKB_TIMESTAMP_TIMEOUT; |
| } |
| |
| static u64 phy2txts(struct phy_txts *p) |
| { |
| u64 ns; |
| u32 sec; |
| |
| sec = p->sec_lo; |
| sec |= p->sec_hi << 16; |
| |
| ns = p->ns_lo; |
| ns |= (p->ns_hi & 0x3fff) << 16; |
| ns += ((u64)sec) * 1000000000ULL; |
| |
| return ns; |
| } |
| |
| static int periodic_output(struct dp83640_clock *clock, |
| struct ptp_clock_request *clkreq, bool on, |
| int trigger) |
| { |
| struct dp83640_private *dp83640 = clock->chosen; |
| struct phy_device *phydev = dp83640->phydev; |
| u32 sec, nsec, pwidth; |
| u16 gpio, ptp_trig, val; |
| |
| if (on) { |
| gpio = 1 + ptp_find_pin(clock->ptp_clock, PTP_PF_PEROUT, |
| trigger); |
| if (gpio < 1) |
| return -EINVAL; |
| } else { |
| gpio = 0; |
| } |
| |
| ptp_trig = TRIG_WR | |
| (trigger & TRIG_CSEL_MASK) << TRIG_CSEL_SHIFT | |
| (gpio & TRIG_GPIO_MASK) << TRIG_GPIO_SHIFT | |
| TRIG_PER | |
| TRIG_PULSE; |
| |
| val = (trigger & TRIG_SEL_MASK) << TRIG_SEL_SHIFT; |
| |
| if (!on) { |
| val |= TRIG_DIS; |
| mutex_lock(&clock->extreg_lock); |
| ext_write(0, phydev, PAGE5, PTP_TRIG, ptp_trig); |
| ext_write(0, phydev, PAGE4, PTP_CTL, val); |
| mutex_unlock(&clock->extreg_lock); |
| return 0; |
| } |
| |
| sec = clkreq->perout.start.sec; |
| nsec = clkreq->perout.start.nsec; |
| pwidth = clkreq->perout.period.sec * 1000000000UL; |
| pwidth += clkreq->perout.period.nsec; |
| pwidth /= 2; |
| |
| mutex_lock(&clock->extreg_lock); |
| |
| ext_write(0, phydev, PAGE5, PTP_TRIG, ptp_trig); |
| |
| /*load trigger*/ |
| val |= TRIG_LOAD; |
| ext_write(0, phydev, PAGE4, PTP_CTL, val); |
| ext_write(0, phydev, PAGE4, PTP_TDR, nsec & 0xffff); /* ns[15:0] */ |
| ext_write(0, phydev, PAGE4, PTP_TDR, nsec >> 16); /* ns[31:16] */ |
| ext_write(0, phydev, PAGE4, PTP_TDR, sec & 0xffff); /* sec[15:0] */ |
| ext_write(0, phydev, PAGE4, PTP_TDR, sec >> 16); /* sec[31:16] */ |
| ext_write(0, phydev, PAGE4, PTP_TDR, pwidth & 0xffff); /* ns[15:0] */ |
| ext_write(0, phydev, PAGE4, PTP_TDR, pwidth >> 16); /* ns[31:16] */ |
| /* Triggers 0 and 1 has programmable pulsewidth2 */ |
| if (trigger < 2) { |
| ext_write(0, phydev, PAGE4, PTP_TDR, pwidth & 0xffff); |
| ext_write(0, phydev, PAGE4, PTP_TDR, pwidth >> 16); |
| } |
| |
| /*enable trigger*/ |
| val &= ~TRIG_LOAD; |
| val |= TRIG_EN; |
| ext_write(0, phydev, PAGE4, PTP_CTL, val); |
| |
| mutex_unlock(&clock->extreg_lock); |
| return 0; |
| } |
| |
| /* ptp clock methods */ |
| |
| static int ptp_dp83640_adjfine(struct ptp_clock_info *ptp, long scaled_ppm) |
| { |
| struct dp83640_clock *clock = |
| container_of(ptp, struct dp83640_clock, caps); |
| struct phy_device *phydev = clock->chosen->phydev; |
| u64 rate; |
| int neg_adj = 0; |
| u16 hi, lo; |
| |
| if (scaled_ppm < 0) { |
| neg_adj = 1; |
| scaled_ppm = -scaled_ppm; |
| } |
| rate = scaled_ppm; |
| rate <<= 13; |
| rate = div_u64(rate, 15625); |
| |
| hi = (rate >> 16) & PTP_RATE_HI_MASK; |
| if (neg_adj) |
| hi |= PTP_RATE_DIR; |
| |
| lo = rate & 0xffff; |
| |
| mutex_lock(&clock->extreg_lock); |
| |
| ext_write(1, phydev, PAGE4, PTP_RATEH, hi); |
| ext_write(1, phydev, PAGE4, PTP_RATEL, lo); |
| |
| mutex_unlock(&clock->extreg_lock); |
| |
| return 0; |
| } |
| |
| static int ptp_dp83640_adjtime(struct ptp_clock_info *ptp, s64 delta) |
| { |
| struct dp83640_clock *clock = |
| container_of(ptp, struct dp83640_clock, caps); |
| struct phy_device *phydev = clock->chosen->phydev; |
| struct timespec64 ts; |
| int err; |
| |
| delta += ADJTIME_FIX; |
| |
| ts = ns_to_timespec64(delta); |
| |
| mutex_lock(&clock->extreg_lock); |
| |
| err = tdr_write(1, phydev, &ts, PTP_STEP_CLK); |
| |
| mutex_unlock(&clock->extreg_lock); |
| |
| return err; |
| } |
| |
| static int ptp_dp83640_gettime(struct ptp_clock_info *ptp, |
| struct timespec64 *ts) |
| { |
| struct dp83640_clock *clock = |
| container_of(ptp, struct dp83640_clock, caps); |
| struct phy_device *phydev = clock->chosen->phydev; |
| unsigned int val[4]; |
| |
| mutex_lock(&clock->extreg_lock); |
| |
| ext_write(0, phydev, PAGE4, PTP_CTL, PTP_RD_CLK); |
| |
| val[0] = ext_read(phydev, PAGE4, PTP_TDR); /* ns[15:0] */ |
| val[1] = ext_read(phydev, PAGE4, PTP_TDR); /* ns[31:16] */ |
| val[2] = ext_read(phydev, PAGE4, PTP_TDR); /* sec[15:0] */ |
| val[3] = ext_read(phydev, PAGE4, PTP_TDR); /* sec[31:16] */ |
| |
| mutex_unlock(&clock->extreg_lock); |
| |
| ts->tv_nsec = val[0] | (val[1] << 16); |
| ts->tv_sec = val[2] | (val[3] << 16); |
| |
| return 0; |
| } |
| |
| static int ptp_dp83640_settime(struct ptp_clock_info *ptp, |
| const struct timespec64 *ts) |
| { |
| struct dp83640_clock *clock = |
| container_of(ptp, struct dp83640_clock, caps); |
| struct phy_device *phydev = clock->chosen->phydev; |
| int err; |
| |
| mutex_lock(&clock->extreg_lock); |
| |
| err = tdr_write(1, phydev, ts, PTP_LOAD_CLK); |
| |
| mutex_unlock(&clock->extreg_lock); |
| |
| return err; |
| } |
| |
| static int ptp_dp83640_enable(struct ptp_clock_info *ptp, |
| struct ptp_clock_request *rq, int on) |
| { |
| struct dp83640_clock *clock = |
| container_of(ptp, struct dp83640_clock, caps); |
| struct phy_device *phydev = clock->chosen->phydev; |
| unsigned int index; |
| u16 evnt, event_num, gpio_num; |
| |
| switch (rq->type) { |
| case PTP_CLK_REQ_EXTTS: |
| /* Reject requests with unsupported flags */ |
| if (rq->extts.flags & ~(PTP_ENABLE_FEATURE | |
| PTP_RISING_EDGE | |
| PTP_FALLING_EDGE | |
| PTP_STRICT_FLAGS)) |
| return -EOPNOTSUPP; |
| |
| /* Reject requests to enable time stamping on both edges. */ |
| if ((rq->extts.flags & PTP_STRICT_FLAGS) && |
| (rq->extts.flags & PTP_ENABLE_FEATURE) && |
| (rq->extts.flags & PTP_EXTTS_EDGES) == PTP_EXTTS_EDGES) |
| return -EOPNOTSUPP; |
| |
| index = rq->extts.index; |
| if (index >= N_EXT_TS) |
| return -EINVAL; |
| event_num = EXT_EVENT + index; |
| evnt = EVNT_WR | (event_num & EVNT_SEL_MASK) << EVNT_SEL_SHIFT; |
| if (on) { |
| gpio_num = 1 + ptp_find_pin(clock->ptp_clock, |
| PTP_PF_EXTTS, index); |
| if (gpio_num < 1) |
| return -EINVAL; |
| evnt |= (gpio_num & EVNT_GPIO_MASK) << EVNT_GPIO_SHIFT; |
| if (rq->extts.flags & PTP_FALLING_EDGE) |
| evnt |= EVNT_FALL; |
| else |
| evnt |= EVNT_RISE; |
| } |
| mutex_lock(&clock->extreg_lock); |
| ext_write(0, phydev, PAGE5, PTP_EVNT, evnt); |
| mutex_unlock(&clock->extreg_lock); |
| return 0; |
| |
| case PTP_CLK_REQ_PEROUT: |
| /* Reject requests with unsupported flags */ |
| if (rq->perout.flags) |
| return -EOPNOTSUPP; |
| if (rq->perout.index >= N_PER_OUT) |
| return -EINVAL; |
| return periodic_output(clock, rq, on, rq->perout.index); |
| |
| default: |
| break; |
| } |
| |
| return -EOPNOTSUPP; |
| } |
| |
| static int ptp_dp83640_verify(struct ptp_clock_info *ptp, unsigned int pin, |
| enum ptp_pin_function func, unsigned int chan) |
| { |
| struct dp83640_clock *clock = |
| container_of(ptp, struct dp83640_clock, caps); |
| |
| if (clock->caps.pin_config[pin].func == PTP_PF_PHYSYNC && |
| !list_empty(&clock->phylist)) |
| return 1; |
| |
| if (func == PTP_PF_PHYSYNC) |
| return 1; |
| |
| return 0; |
| } |
| |
| static u8 status_frame_dst[6] = { 0x01, 0x1B, 0x19, 0x00, 0x00, 0x00 }; |
| static u8 status_frame_src[6] = { 0x08, 0x00, 0x17, 0x0B, 0x6B, 0x0F }; |
| |
| static void enable_status_frames(struct phy_device *phydev, bool on) |
| { |
| struct dp83640_private *dp83640 = phydev->priv; |
| struct dp83640_clock *clock = dp83640->clock; |
| u16 cfg0 = 0, ver; |
| |
| if (on) |
| cfg0 = PSF_EVNT_EN | PSF_RXTS_EN | PSF_TXTS_EN | ENDIAN_FLAG; |
| |
| ver = (PSF_PTPVER & VERSIONPTP_MASK) << VERSIONPTP_SHIFT; |
| |
| mutex_lock(&clock->extreg_lock); |
| |
| ext_write(0, phydev, PAGE5, PSF_CFG0, cfg0); |
| ext_write(0, phydev, PAGE6, PSF_CFG1, ver); |
| |
| mutex_unlock(&clock->extreg_lock); |
| |
| if (!phydev->attached_dev) { |
| phydev_warn(phydev, |
| "expected to find an attached netdevice\n"); |
| return; |
| } |
| |
| if (on) { |
| if (dev_mc_add(phydev->attached_dev, status_frame_dst)) |
| phydev_warn(phydev, "failed to add mc address\n"); |
| } else { |
| if (dev_mc_del(phydev->attached_dev, status_frame_dst)) |
| phydev_warn(phydev, "failed to delete mc address\n"); |
| } |
| } |
| |
| static bool is_status_frame(struct sk_buff *skb, int type) |
| { |
| struct ethhdr *h = eth_hdr(skb); |
| |
| if (PTP_CLASS_V2_L2 == type && |
| !memcmp(h->h_source, status_frame_src, sizeof(status_frame_src))) |
| return true; |
| else |
| return false; |
| } |
| |
| static int expired(struct rxts *rxts) |
| { |
| return time_after(jiffies, rxts->tmo); |
| } |
| |
| /* Caller must hold rx_lock. */ |
| static void prune_rx_ts(struct dp83640_private *dp83640) |
| { |
| struct list_head *this, *next; |
| struct rxts *rxts; |
| |
| list_for_each_safe(this, next, &dp83640->rxts) { |
| rxts = list_entry(this, struct rxts, list); |
| if (expired(rxts)) { |
| list_del_init(&rxts->list); |
| list_add(&rxts->list, &dp83640->rxpool); |
| } |
| } |
| } |
| |
| /* synchronize the phyters so they act as one clock */ |
| |
| static void enable_broadcast(struct phy_device *phydev, int init_page, int on) |
| { |
| int val; |
| phy_write(phydev, PAGESEL, 0); |
| val = phy_read(phydev, PHYCR2); |
| if (on) |
| val |= BC_WRITE; |
| else |
| val &= ~BC_WRITE; |
| phy_write(phydev, PHYCR2, val); |
| phy_write(phydev, PAGESEL, init_page); |
| } |
| |
| static void recalibrate(struct dp83640_clock *clock) |
| { |
| s64 now, diff; |
| struct phy_txts event_ts; |
| struct timespec64 ts; |
| struct list_head *this; |
| struct dp83640_private *tmp; |
| struct phy_device *master = clock->chosen->phydev; |
| u16 cal_gpio, cfg0, evnt, ptp_trig, trigger, val; |
| |
| trigger = CAL_TRIGGER; |
| cal_gpio = 1 + ptp_find_pin(clock->ptp_clock, PTP_PF_PHYSYNC, 0); |
| if (cal_gpio < 1) { |
| pr_err("PHY calibration pin not available - PHY is not calibrated."); |
| return; |
| } |
| |
| mutex_lock(&clock->extreg_lock); |
| |
| /* |
| * enable broadcast, disable status frames, enable ptp clock |
| */ |
| list_for_each(this, &clock->phylist) { |
| tmp = list_entry(this, struct dp83640_private, list); |
| enable_broadcast(tmp->phydev, clock->page, 1); |
| tmp->cfg0 = ext_read(tmp->phydev, PAGE5, PSF_CFG0); |
| ext_write(0, tmp->phydev, PAGE5, PSF_CFG0, 0); |
| ext_write(0, tmp->phydev, PAGE4, PTP_CTL, PTP_ENABLE); |
| } |
| enable_broadcast(master, clock->page, 1); |
| cfg0 = ext_read(master, PAGE5, PSF_CFG0); |
| ext_write(0, master, PAGE5, PSF_CFG0, 0); |
| ext_write(0, master, PAGE4, PTP_CTL, PTP_ENABLE); |
| |
| /* |
| * enable an event timestamp |
| */ |
| evnt = EVNT_WR | EVNT_RISE | EVNT_SINGLE; |
| evnt |= (CAL_EVENT & EVNT_SEL_MASK) << EVNT_SEL_SHIFT; |
| evnt |= (cal_gpio & EVNT_GPIO_MASK) << EVNT_GPIO_SHIFT; |
| |
| list_for_each(this, &clock->phylist) { |
| tmp = list_entry(this, struct dp83640_private, list); |
| ext_write(0, tmp->phydev, PAGE5, PTP_EVNT, evnt); |
| } |
| ext_write(0, master, PAGE5, PTP_EVNT, evnt); |
| |
| /* |
| * configure a trigger |
| */ |
| ptp_trig = TRIG_WR | TRIG_IF_LATE | TRIG_PULSE; |
| ptp_trig |= (trigger & TRIG_CSEL_MASK) << TRIG_CSEL_SHIFT; |
| ptp_trig |= (cal_gpio & TRIG_GPIO_MASK) << TRIG_GPIO_SHIFT; |
| ext_write(0, master, PAGE5, PTP_TRIG, ptp_trig); |
| |
| /* load trigger */ |
| val = (trigger & TRIG_SEL_MASK) << TRIG_SEL_SHIFT; |
| val |= TRIG_LOAD; |
| ext_write(0, master, PAGE4, PTP_CTL, val); |
| |
| /* enable trigger */ |
| val &= ~TRIG_LOAD; |
| val |= TRIG_EN; |
| ext_write(0, master, PAGE4, PTP_CTL, val); |
| |
| /* disable trigger */ |
| val = (trigger & TRIG_SEL_MASK) << TRIG_SEL_SHIFT; |
| val |= TRIG_DIS; |
| ext_write(0, master, PAGE4, PTP_CTL, val); |
| |
| /* |
| * read out and correct offsets |
| */ |
| val = ext_read(master, PAGE4, PTP_STS); |
| phydev_info(master, "master PTP_STS 0x%04hx\n", val); |
| val = ext_read(master, PAGE4, PTP_ESTS); |
| phydev_info(master, "master PTP_ESTS 0x%04hx\n", val); |
| event_ts.ns_lo = ext_read(master, PAGE4, PTP_EDATA); |
| event_ts.ns_hi = ext_read(master, PAGE4, PTP_EDATA); |
| event_ts.sec_lo = ext_read(master, PAGE4, PTP_EDATA); |
| event_ts.sec_hi = ext_read(master, PAGE4, PTP_EDATA); |
| now = phy2txts(&event_ts); |
| |
| list_for_each(this, &clock->phylist) { |
| tmp = list_entry(this, struct dp83640_private, list); |
| val = ext_read(tmp->phydev, PAGE4, PTP_STS); |
| phydev_info(tmp->phydev, "slave PTP_STS 0x%04hx\n", val); |
| val = ext_read(tmp->phydev, PAGE4, PTP_ESTS); |
| phydev_info(tmp->phydev, "slave PTP_ESTS 0x%04hx\n", val); |
| event_ts.ns_lo = ext_read(tmp->phydev, PAGE4, PTP_EDATA); |
| event_ts.ns_hi = ext_read(tmp->phydev, PAGE4, PTP_EDATA); |
| event_ts.sec_lo = ext_read(tmp->phydev, PAGE4, PTP_EDATA); |
| event_ts.sec_hi = ext_read(tmp->phydev, PAGE4, PTP_EDATA); |
| diff = now - (s64) phy2txts(&event_ts); |
| phydev_info(tmp->phydev, "slave offset %lld nanoseconds\n", |
| diff); |
| diff += ADJTIME_FIX; |
| ts = ns_to_timespec64(diff); |
| tdr_write(0, tmp->phydev, &ts, PTP_STEP_CLK); |
| } |
| |
| /* |
| * restore status frames |
| */ |
| list_for_each(this, &clock->phylist) { |
| tmp = list_entry(this, struct dp83640_private, list); |
| ext_write(0, tmp->phydev, PAGE5, PSF_CFG0, tmp->cfg0); |
| } |
| ext_write(0, master, PAGE5, PSF_CFG0, cfg0); |
| |
| mutex_unlock(&clock->extreg_lock); |
| } |
| |
| /* time stamping methods */ |
| |
| static inline u16 exts_chan_to_edata(int ch) |
| { |
| return 1 << ((ch + EXT_EVENT) * 2); |
| } |
| |
| static int decode_evnt(struct dp83640_private *dp83640, |
| void *data, int len, u16 ests) |
| { |
| struct phy_txts *phy_txts; |
| struct ptp_clock_event event; |
| int i, parsed; |
| int words = (ests >> EVNT_TS_LEN_SHIFT) & EVNT_TS_LEN_MASK; |
| u16 ext_status = 0; |
| |
| /* calculate length of the event timestamp status message */ |
| if (ests & MULT_EVNT) |
| parsed = (words + 2) * sizeof(u16); |
| else |
| parsed = (words + 1) * sizeof(u16); |
| |
| /* check if enough data is available */ |
| if (len < parsed) |
| return len; |
| |
| if (ests & MULT_EVNT) { |
| ext_status = *(u16 *) data; |
| data += sizeof(ext_status); |
| } |
| |
| phy_txts = data; |
| |
| switch (words) { |
| case 3: |
| dp83640->edata.sec_hi = phy_txts->sec_hi; |
| /* fall through */ |
| case 2: |
| dp83640->edata.sec_lo = phy_txts->sec_lo; |
| /* fall through */ |
| case 1: |
| dp83640->edata.ns_hi = phy_txts->ns_hi; |
| /* fall through */ |
| case 0: |
| dp83640->edata.ns_lo = phy_txts->ns_lo; |
| } |
| |
| if (!ext_status) { |
| i = ((ests >> EVNT_NUM_SHIFT) & EVNT_NUM_MASK) - EXT_EVENT; |
| ext_status = exts_chan_to_edata(i); |
| } |
| |
| event.type = PTP_CLOCK_EXTTS; |
| event.timestamp = phy2txts(&dp83640->edata); |
| |
| /* Compensate for input path and synchronization delays */ |
| event.timestamp -= 35; |
| |
| for (i = 0; i < N_EXT_TS; i++) { |
| if (ext_status & exts_chan_to_edata(i)) { |
| event.index = i; |
| ptp_clock_event(dp83640->clock->ptp_clock, &event); |
| } |
| } |
| |
| return parsed; |
| } |
| |
| #define DP83640_PACKET_HASH_OFFSET 20 |
| #define DP83640_PACKET_HASH_LEN 10 |
| |
| static int match(struct sk_buff *skb, unsigned int type, struct rxts *rxts) |
| { |
| u16 *seqid, hash; |
| unsigned int offset = 0; |
| u8 *msgtype, *data = skb_mac_header(skb); |
| |
| /* check sequenceID, messageType, 12 bit hash of offset 20-29 */ |
| |
| if (type & PTP_CLASS_VLAN) |
| offset += VLAN_HLEN; |
| |
| switch (type & PTP_CLASS_PMASK) { |
| case PTP_CLASS_IPV4: |
| offset += ETH_HLEN + IPV4_HLEN(data + offset) + UDP_HLEN; |
| break; |
| case PTP_CLASS_IPV6: |
| offset += ETH_HLEN + IP6_HLEN + UDP_HLEN; |
| break; |
| case PTP_CLASS_L2: |
| offset += ETH_HLEN; |
| break; |
| default: |
| return 0; |
| } |
| |
| if (skb->len + ETH_HLEN < offset + OFF_PTP_SEQUENCE_ID + sizeof(*seqid)) |
| return 0; |
| |
| if (unlikely(type & PTP_CLASS_V1)) |
| msgtype = data + offset + OFF_PTP_CONTROL; |
| else |
| msgtype = data + offset; |
| if (rxts->msgtype != (*msgtype & 0xf)) |
| return 0; |
| |
| seqid = (u16 *)(data + offset + OFF_PTP_SEQUENCE_ID); |
| if (rxts->seqid != ntohs(*seqid)) |
| return 0; |
| |
| hash = ether_crc(DP83640_PACKET_HASH_LEN, |
| data + offset + DP83640_PACKET_HASH_OFFSET) >> 20; |
| if (rxts->hash != hash) |
| return 0; |
| |
| return 1; |
| } |
| |
| static void decode_rxts(struct dp83640_private *dp83640, |
| struct phy_rxts *phy_rxts) |
| { |
| struct rxts *rxts; |
| struct skb_shared_hwtstamps *shhwtstamps = NULL; |
| struct sk_buff *skb; |
| unsigned long flags; |
| u8 overflow; |
| |
| overflow = (phy_rxts->ns_hi >> 14) & 0x3; |
| if (overflow) |
| pr_debug("rx timestamp queue overflow, count %d\n", overflow); |
| |
| spin_lock_irqsave(&dp83640->rx_lock, flags); |
| |
| prune_rx_ts(dp83640); |
| |
| if (list_empty(&dp83640->rxpool)) { |
| pr_debug("rx timestamp pool is empty\n"); |
| goto out; |
| } |
| rxts = list_first_entry(&dp83640->rxpool, struct rxts, list); |
| list_del_init(&rxts->list); |
| phy2rxts(phy_rxts, rxts); |
| |
| spin_lock(&dp83640->rx_queue.lock); |
| skb_queue_walk(&dp83640->rx_queue, skb) { |
| struct dp83640_skb_info *skb_info; |
| |
| skb_info = (struct dp83640_skb_info *)skb->cb; |
| if (match(skb, skb_info->ptp_type, rxts)) { |
| __skb_unlink(skb, &dp83640->rx_queue); |
| shhwtstamps = skb_hwtstamps(skb); |
| memset(shhwtstamps, 0, sizeof(*shhwtstamps)); |
| shhwtstamps->hwtstamp = ns_to_ktime(rxts->ns); |
| list_add(&rxts->list, &dp83640->rxpool); |
| break; |
| } |
| } |
| spin_unlock(&dp83640->rx_queue.lock); |
| |
| if (!shhwtstamps) |
| list_add_tail(&rxts->list, &dp83640->rxts); |
| out: |
| spin_unlock_irqrestore(&dp83640->rx_lock, flags); |
| |
| if (shhwtstamps) |
| netif_rx_ni(skb); |
| } |
| |
| static void decode_txts(struct dp83640_private *dp83640, |
| struct phy_txts *phy_txts) |
| { |
| struct skb_shared_hwtstamps shhwtstamps; |
| struct dp83640_skb_info *skb_info; |
| struct sk_buff *skb; |
| u8 overflow; |
| u64 ns; |
| |
| /* We must already have the skb that triggered this. */ |
| again: |
| skb = skb_dequeue(&dp83640->tx_queue); |
| if (!skb) { |
| pr_debug("have timestamp but tx_queue empty\n"); |
| return; |
| } |
| |
| overflow = (phy_txts->ns_hi >> 14) & 0x3; |
| if (overflow) { |
| pr_debug("tx timestamp queue overflow, count %d\n", overflow); |
| while (skb) { |
| kfree_skb(skb); |
| skb = skb_dequeue(&dp83640->tx_queue); |
| } |
| return; |
| } |
| skb_info = (struct dp83640_skb_info *)skb->cb; |
| if (time_after(jiffies, skb_info->tmo)) { |
| kfree_skb(skb); |
| goto again; |
| } |
| |
| ns = phy2txts(phy_txts); |
| memset(&shhwtstamps, 0, sizeof(shhwtstamps)); |
| shhwtstamps.hwtstamp = ns_to_ktime(ns); |
| skb_complete_tx_timestamp(skb, &shhwtstamps); |
| } |
| |
| static void decode_status_frame(struct dp83640_private *dp83640, |
| struct sk_buff *skb) |
| { |
| struct phy_rxts *phy_rxts; |
| struct phy_txts *phy_txts; |
| u8 *ptr; |
| int len, size; |
| u16 ests, type; |
| |
| ptr = skb->data + 2; |
| |
| for (len = skb_headlen(skb) - 2; len > sizeof(type); len -= size) { |
| |
| type = *(u16 *)ptr; |
| ests = type & 0x0fff; |
| type = type & 0xf000; |
| len -= sizeof(type); |
| ptr += sizeof(type); |
| |
| if (PSF_RX == type && len >= sizeof(*phy_rxts)) { |
| |
| phy_rxts = (struct phy_rxts *) ptr; |
| decode_rxts(dp83640, phy_rxts); |
| size = sizeof(*phy_rxts); |
| |
| } else if (PSF_TX == type && len >= sizeof(*phy_txts)) { |
| |
| phy_txts = (struct phy_txts *) ptr; |
| decode_txts(dp83640, phy_txts); |
| size = sizeof(*phy_txts); |
| |
| } else if (PSF_EVNT == type) { |
| |
| size = decode_evnt(dp83640, ptr, len, ests); |
| |
| } else { |
| size = 0; |
| break; |
| } |
| ptr += size; |
| } |
| } |
| |
| static int is_sync(struct sk_buff *skb, int type) |
| { |
| u8 *data = skb->data, *msgtype; |
| unsigned int offset = 0; |
| |
| if (type & PTP_CLASS_VLAN) |
| offset += VLAN_HLEN; |
| |
| switch (type & PTP_CLASS_PMASK) { |
| case PTP_CLASS_IPV4: |
| offset += ETH_HLEN + IPV4_HLEN(data + offset) + UDP_HLEN; |
| break; |
| case PTP_CLASS_IPV6: |
| offset += ETH_HLEN + IP6_HLEN + UDP_HLEN; |
| break; |
| case PTP_CLASS_L2: |
| offset += ETH_HLEN; |
| break; |
| default: |
| return 0; |
| } |
| |
| if (type & PTP_CLASS_V1) |
| offset += OFF_PTP_CONTROL; |
| |
| if (skb->len < offset + 1) |
| return 0; |
| |
| msgtype = data + offset; |
| |
| return (*msgtype & 0xf) == 0; |
| } |
| |
| static void dp83640_free_clocks(void) |
| { |
| struct dp83640_clock *clock; |
| struct list_head *this, *next; |
| |
| mutex_lock(&phyter_clocks_lock); |
| |
| list_for_each_safe(this, next, &phyter_clocks) { |
| clock = list_entry(this, struct dp83640_clock, list); |
| if (!list_empty(&clock->phylist)) { |
| pr_warn("phy list non-empty while unloading\n"); |
| BUG(); |
| } |
| list_del(&clock->list); |
| mutex_destroy(&clock->extreg_lock); |
| mutex_destroy(&clock->clock_lock); |
| put_device(&clock->bus->dev); |
| kfree(clock->caps.pin_config); |
| kfree(clock); |
| } |
| |
| mutex_unlock(&phyter_clocks_lock); |
| } |
| |
| static void dp83640_clock_init(struct dp83640_clock *clock, struct mii_bus *bus) |
| { |
| INIT_LIST_HEAD(&clock->list); |
| clock->bus = bus; |
| mutex_init(&clock->extreg_lock); |
| mutex_init(&clock->clock_lock); |
| INIT_LIST_HEAD(&clock->phylist); |
| clock->caps.owner = THIS_MODULE; |
| sprintf(clock->caps.name, "dp83640 timer"); |
| clock->caps.max_adj = 1953124; |
| clock->caps.n_alarm = 0; |
| clock->caps.n_ext_ts = N_EXT_TS; |
| clock->caps.n_per_out = N_PER_OUT; |
| clock->caps.n_pins = DP83640_N_PINS; |
| clock->caps.pps = 0; |
| clock->caps.adjfine = ptp_dp83640_adjfine; |
| clock->caps.adjtime = ptp_dp83640_adjtime; |
| clock->caps.gettime64 = ptp_dp83640_gettime; |
| clock->caps.settime64 = ptp_dp83640_settime; |
| clock->caps.enable = ptp_dp83640_enable; |
| clock->caps.verify = ptp_dp83640_verify; |
| /* |
| * Convert the module param defaults into a dynamic pin configuration. |
| */ |
| dp83640_gpio_defaults(clock->caps.pin_config); |
| /* |
| * Get a reference to this bus instance. |
| */ |
| get_device(&bus->dev); |
| } |
| |
| static int choose_this_phy(struct dp83640_clock *clock, |
| struct phy_device *phydev) |
| { |
| if (chosen_phy == -1 && !clock->chosen) |
| return 1; |
| |
| if (chosen_phy == phydev->mdio.addr) |
| return 1; |
| |
| return 0; |
| } |
| |
| static struct dp83640_clock *dp83640_clock_get(struct dp83640_clock *clock) |
| { |
| if (clock) |
| mutex_lock(&clock->clock_lock); |
| return clock; |
| } |
| |
| /* |
| * Look up and lock a clock by bus instance. |
| * If there is no clock for this bus, then create it first. |
| */ |
| static struct dp83640_clock *dp83640_clock_get_bus(struct mii_bus *bus) |
| { |
| struct dp83640_clock *clock = NULL, *tmp; |
| struct list_head *this; |
| |
| mutex_lock(&phyter_clocks_lock); |
| |
| list_for_each(this, &phyter_clocks) { |
| tmp = list_entry(this, struct dp83640_clock, list); |
| if (tmp->bus == bus) { |
| clock = tmp; |
| break; |
| } |
| } |
| if (clock) |
| goto out; |
| |
| clock = kzalloc(sizeof(struct dp83640_clock), GFP_KERNEL); |
| if (!clock) |
| goto out; |
| |
| clock->caps.pin_config = kcalloc(DP83640_N_PINS, |
| sizeof(struct ptp_pin_desc), |
| GFP_KERNEL); |
| if (!clock->caps.pin_config) { |
| kfree(clock); |
| clock = NULL; |
| goto out; |
| } |
| dp83640_clock_init(clock, bus); |
| list_add_tail(&clock->list, &phyter_clocks); |
| out: |
| mutex_unlock(&phyter_clocks_lock); |
| |
| return dp83640_clock_get(clock); |
| } |
| |
| static void dp83640_clock_put(struct dp83640_clock *clock) |
| { |
| mutex_unlock(&clock->clock_lock); |
| } |
| |
| static int dp83640_probe(struct phy_device *phydev) |
| { |
| struct dp83640_clock *clock; |
| struct dp83640_private *dp83640; |
| int err = -ENOMEM, i; |
| |
| if (phydev->mdio.addr == BROADCAST_ADDR) |
| return 0; |
| |
| clock = dp83640_clock_get_bus(phydev->mdio.bus); |
| if (!clock) |
| goto no_clock; |
| |
| dp83640 = kzalloc(sizeof(struct dp83640_private), GFP_KERNEL); |
| if (!dp83640) |
| goto no_memory; |
| |
| dp83640->phydev = phydev; |
| INIT_DELAYED_WORK(&dp83640->ts_work, rx_timestamp_work); |
| |
| INIT_LIST_HEAD(&dp83640->rxts); |
| INIT_LIST_HEAD(&dp83640->rxpool); |
| for (i = 0; i < MAX_RXTS; i++) |
| list_add(&dp83640->rx_pool_data[i].list, &dp83640->rxpool); |
| |
| phydev->priv = dp83640; |
| |
| spin_lock_init(&dp83640->rx_lock); |
| skb_queue_head_init(&dp83640->rx_queue); |
| skb_queue_head_init(&dp83640->tx_queue); |
| |
| dp83640->clock = clock; |
| |
| if (choose_this_phy(clock, phydev)) { |
| clock->chosen = dp83640; |
| clock->ptp_clock = ptp_clock_register(&clock->caps, |
| &phydev->mdio.dev); |
| if (IS_ERR(clock->ptp_clock)) { |
| err = PTR_ERR(clock->ptp_clock); |
| goto no_register; |
| } |
| } else |
| list_add_tail(&dp83640->list, &clock->phylist); |
| |
| dp83640_clock_put(clock); |
| return 0; |
| |
| no_register: |
| clock->chosen = NULL; |
| kfree(dp83640); |
| no_memory: |
| dp83640_clock_put(clock); |
| no_clock: |
| return err; |
| } |
| |
| static void dp83640_remove(struct phy_device *phydev) |
| { |
| struct dp83640_clock *clock; |
| struct list_head *this, *next; |
| struct dp83640_private *tmp, *dp83640 = phydev->priv; |
| |
| if (phydev->mdio.addr == BROADCAST_ADDR) |
| return; |
| |
| enable_status_frames(phydev, false); |
| cancel_delayed_work_sync(&dp83640->ts_work); |
| |
| skb_queue_purge(&dp83640->rx_queue); |
| skb_queue_purge(&dp83640->tx_queue); |
| |
| clock = dp83640_clock_get(dp83640->clock); |
| |
| if (dp83640 == clock->chosen) { |
| ptp_clock_unregister(clock->ptp_clock); |
| clock->chosen = NULL; |
| } else { |
| list_for_each_safe(this, next, &clock->phylist) { |
| tmp = list_entry(this, struct dp83640_private, list); |
| if (tmp == dp83640) { |
| list_del_init(&tmp->list); |
| break; |
| } |
| } |
| } |
| |
| dp83640_clock_put(clock); |
| kfree(dp83640); |
| } |
| |
| static int dp83640_soft_reset(struct phy_device *phydev) |
| { |
| int ret; |
| |
| ret = genphy_soft_reset(phydev); |
| if (ret < 0) |
| return ret; |
| |
| /* From DP83640 datasheet: "Software driver code must wait 3 us |
| * following a software reset before allowing further serial MII |
| * operations with the DP83640." |
| */ |
| udelay(10); /* Taking udelay inaccuracy into account */ |
| |
| return 0; |
| } |
| |
| static int dp83640_config_init(struct phy_device *phydev) |
| { |
| struct dp83640_private *dp83640 = phydev->priv; |
| struct dp83640_clock *clock = dp83640->clock; |
| |
| if (clock->chosen && !list_empty(&clock->phylist)) |
| recalibrate(clock); |
| else { |
| mutex_lock(&clock->extreg_lock); |
| enable_broadcast(phydev, clock->page, 1); |
| mutex_unlock(&clock->extreg_lock); |
| } |
| |
| enable_status_frames(phydev, true); |
| |
| mutex_lock(&clock->extreg_lock); |
| ext_write(0, phydev, PAGE4, PTP_CTL, PTP_ENABLE); |
| mutex_unlock(&clock->extreg_lock); |
| |
| return 0; |
| } |
| |
| static int dp83640_ack_interrupt(struct phy_device *phydev) |
| { |
| int err = phy_read(phydev, MII_DP83640_MISR); |
| |
| if (err < 0) |
| return err; |
| |
| return 0; |
| } |
| |
| static int dp83640_config_intr(struct phy_device *phydev) |
| { |
| int micr; |
| int misr; |
| int err; |
| |
| if (phydev->interrupts == PHY_INTERRUPT_ENABLED) { |
| misr = phy_read(phydev, MII_DP83640_MISR); |
| if (misr < 0) |
| return misr; |
| misr |= |
| (MII_DP83640_MISR_ANC_INT_EN | |
| MII_DP83640_MISR_DUP_INT_EN | |
| MII_DP83640_MISR_SPD_INT_EN | |
| MII_DP83640_MISR_LINK_INT_EN); |
| err = phy_write(phydev, MII_DP83640_MISR, misr); |
| if (err < 0) |
| return err; |
| |
| micr = phy_read(phydev, MII_DP83640_MICR); |
| if (micr < 0) |
| return micr; |
| micr |= |
| (MII_DP83640_MICR_OE | |
| MII_DP83640_MICR_IE); |
| return phy_write(phydev, MII_DP83640_MICR, micr); |
| } else { |
| micr = phy_read(phydev, MII_DP83640_MICR); |
| if (micr < 0) |
| return micr; |
| micr &= |
| ~(MII_DP83640_MICR_OE | |
| MII_DP83640_MICR_IE); |
| err = phy_write(phydev, MII_DP83640_MICR, micr); |
| if (err < 0) |
| return err; |
| |
| misr = phy_read(phydev, MII_DP83640_MISR); |
| if (misr < 0) |
| return misr; |
| misr &= |
| ~(MII_DP83640_MISR_ANC_INT_EN | |
| MII_DP83640_MISR_DUP_INT_EN | |
| MII_DP83640_MISR_SPD_INT_EN | |
| MII_DP83640_MISR_LINK_INT_EN); |
| return phy_write(phydev, MII_DP83640_MISR, misr); |
| } |
| } |
| |
| static int dp83640_hwtstamp(struct phy_device *phydev, struct ifreq *ifr) |
| { |
| struct dp83640_private *dp83640 = phydev->priv; |
| struct hwtstamp_config cfg; |
| u16 txcfg0, rxcfg0; |
| |
| if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg))) |
| return -EFAULT; |
| |
| if (cfg.flags) /* reserved for future extensions */ |
| return -EINVAL; |
| |
| if (cfg.tx_type < 0 || cfg.tx_type > HWTSTAMP_TX_ONESTEP_SYNC) |
| return -ERANGE; |
| |
| dp83640->hwts_tx_en = cfg.tx_type; |
| |
| switch (cfg.rx_filter) { |
| case HWTSTAMP_FILTER_NONE: |
| dp83640->hwts_rx_en = 0; |
| dp83640->layer = 0; |
| dp83640->version = 0; |
| break; |
| case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: |
| case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: |
| case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: |
| dp83640->hwts_rx_en = 1; |
| dp83640->layer = PTP_CLASS_L4; |
| dp83640->version = PTP_CLASS_V1; |
| break; |
| case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: |
| case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: |
| case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: |
| dp83640->hwts_rx_en = 1; |
| dp83640->layer = PTP_CLASS_L4; |
| dp83640->version = PTP_CLASS_V2; |
| break; |
| case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: |
| case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: |
| case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: |
| dp83640->hwts_rx_en = 1; |
| dp83640->layer = PTP_CLASS_L2; |
| dp83640->version = PTP_CLASS_V2; |
| break; |
| case HWTSTAMP_FILTER_PTP_V2_EVENT: |
| case HWTSTAMP_FILTER_PTP_V2_SYNC: |
| case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: |
| dp83640->hwts_rx_en = 1; |
| dp83640->layer = PTP_CLASS_L4 | PTP_CLASS_L2; |
| dp83640->version = PTP_CLASS_V2; |
| break; |
| default: |
| return -ERANGE; |
| } |
| |
| txcfg0 = (dp83640->version & TX_PTP_VER_MASK) << TX_PTP_VER_SHIFT; |
| rxcfg0 = (dp83640->version & TX_PTP_VER_MASK) << TX_PTP_VER_SHIFT; |
| |
| if (dp83640->layer & PTP_CLASS_L2) { |
| txcfg0 |= TX_L2_EN; |
| rxcfg0 |= RX_L2_EN; |
| } |
| if (dp83640->layer & PTP_CLASS_L4) { |
| txcfg0 |= TX_IPV6_EN | TX_IPV4_EN; |
| rxcfg0 |= RX_IPV6_EN | RX_IPV4_EN; |
| } |
| |
| if (dp83640->hwts_tx_en) |
| txcfg0 |= TX_TS_EN; |
| |
| if (dp83640->hwts_tx_en == HWTSTAMP_TX_ONESTEP_SYNC) |
| txcfg0 |= SYNC_1STEP | CHK_1STEP; |
| |
| if (dp83640->hwts_rx_en) |
| rxcfg0 |= RX_TS_EN; |
| |
| mutex_lock(&dp83640->clock->extreg_lock); |
| |
| ext_write(0, phydev, PAGE5, PTP_TXCFG0, txcfg0); |
| ext_write(0, phydev, PAGE5, PTP_RXCFG0, rxcfg0); |
| |
| mutex_unlock(&dp83640->clock->extreg_lock); |
| |
| return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0; |
| } |
| |
| static void rx_timestamp_work(struct work_struct *work) |
| { |
| struct dp83640_private *dp83640 = |
| container_of(work, struct dp83640_private, ts_work.work); |
| struct sk_buff *skb; |
| |
| /* Deliver expired packets. */ |
| while ((skb = skb_dequeue(&dp83640->rx_queue))) { |
| struct dp83640_skb_info *skb_info; |
| |
| skb_info = (struct dp83640_skb_info *)skb->cb; |
| if (!time_after(jiffies, skb_info->tmo)) { |
| skb_queue_head(&dp83640->rx_queue, skb); |
| break; |
| } |
| |
| netif_rx_ni(skb); |
| } |
| |
| if (!skb_queue_empty(&dp83640->rx_queue)) |
| schedule_delayed_work(&dp83640->ts_work, SKB_TIMESTAMP_TIMEOUT); |
| } |
| |
| static bool dp83640_rxtstamp(struct phy_device *phydev, |
| struct sk_buff *skb, int type) |
| { |
| struct dp83640_private *dp83640 = phydev->priv; |
| struct dp83640_skb_info *skb_info = (struct dp83640_skb_info *)skb->cb; |
| struct list_head *this, *next; |
| struct rxts *rxts; |
| struct skb_shared_hwtstamps *shhwtstamps = NULL; |
| unsigned long flags; |
| |
| if (is_status_frame(skb, type)) { |
| decode_status_frame(dp83640, skb); |
| kfree_skb(skb); |
| return true; |
| } |
| |
| if (!dp83640->hwts_rx_en) |
| return false; |
| |
| if ((type & dp83640->version) == 0 || (type & dp83640->layer) == 0) |
| return false; |
| |
| spin_lock_irqsave(&dp83640->rx_lock, flags); |
| prune_rx_ts(dp83640); |
| list_for_each_safe(this, next, &dp83640->rxts) { |
| rxts = list_entry(this, struct rxts, list); |
| if (match(skb, type, rxts)) { |
| shhwtstamps = skb_hwtstamps(skb); |
| memset(shhwtstamps, 0, sizeof(*shhwtstamps)); |
| shhwtstamps->hwtstamp = ns_to_ktime(rxts->ns); |
| list_del_init(&rxts->list); |
| list_add(&rxts->list, &dp83640->rxpool); |
| break; |
| } |
| } |
| spin_unlock_irqrestore(&dp83640->rx_lock, flags); |
| |
| if (!shhwtstamps) { |
| skb_info->ptp_type = type; |
| skb_info->tmo = jiffies + SKB_TIMESTAMP_TIMEOUT; |
| skb_queue_tail(&dp83640->rx_queue, skb); |
| schedule_delayed_work(&dp83640->ts_work, SKB_TIMESTAMP_TIMEOUT); |
| } else { |
| netif_rx_ni(skb); |
| } |
| |
| return true; |
| } |
| |
| static void dp83640_txtstamp(struct phy_device *phydev, |
| struct sk_buff *skb, int type) |
| { |
| struct dp83640_skb_info *skb_info = (struct dp83640_skb_info *)skb->cb; |
| struct dp83640_private *dp83640 = phydev->priv; |
| |
| switch (dp83640->hwts_tx_en) { |
| |
| case HWTSTAMP_TX_ONESTEP_SYNC: |
| if (is_sync(skb, type)) { |
| kfree_skb(skb); |
| return; |
| } |
| /* fall through */ |
| case HWTSTAMP_TX_ON: |
| skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; |
| skb_info->tmo = jiffies + SKB_TIMESTAMP_TIMEOUT; |
| skb_queue_tail(&dp83640->tx_queue, skb); |
| break; |
| |
| case HWTSTAMP_TX_OFF: |
| default: |
| kfree_skb(skb); |
| break; |
| } |
| } |
| |
| static int dp83640_ts_info(struct phy_device *dev, struct ethtool_ts_info *info) |
| { |
| struct dp83640_private *dp83640 = dev->priv; |
| |
| info->so_timestamping = |
| SOF_TIMESTAMPING_TX_HARDWARE | |
| SOF_TIMESTAMPING_RX_HARDWARE | |
| SOF_TIMESTAMPING_RAW_HARDWARE; |
| info->phc_index = ptp_clock_index(dp83640->clock->ptp_clock); |
| info->tx_types = |
| (1 << HWTSTAMP_TX_OFF) | |
| (1 << HWTSTAMP_TX_ON) | |
| (1 << HWTSTAMP_TX_ONESTEP_SYNC); |
| info->rx_filters = |
| (1 << HWTSTAMP_FILTER_NONE) | |
| (1 << HWTSTAMP_FILTER_PTP_V1_L4_EVENT) | |
| (1 << HWTSTAMP_FILTER_PTP_V2_L4_EVENT) | |
| (1 << HWTSTAMP_FILTER_PTP_V2_L2_EVENT) | |
| (1 << HWTSTAMP_FILTER_PTP_V2_EVENT); |
| return 0; |
| } |
| |
| static struct phy_driver dp83640_driver = { |
| .phy_id = DP83640_PHY_ID, |
| .phy_id_mask = 0xfffffff0, |
| .name = "NatSemi DP83640", |
| /* PHY_BASIC_FEATURES */ |
| .probe = dp83640_probe, |
| .remove = dp83640_remove, |
| .soft_reset = dp83640_soft_reset, |
| .config_init = dp83640_config_init, |
| .ack_interrupt = dp83640_ack_interrupt, |
| .config_intr = dp83640_config_intr, |
| .ts_info = dp83640_ts_info, |
| .hwtstamp = dp83640_hwtstamp, |
| .rxtstamp = dp83640_rxtstamp, |
| .txtstamp = dp83640_txtstamp, |
| }; |
| |
| static int __init dp83640_init(void) |
| { |
| return phy_driver_register(&dp83640_driver, THIS_MODULE); |
| } |
| |
| static void __exit dp83640_exit(void) |
| { |
| dp83640_free_clocks(); |
| phy_driver_unregister(&dp83640_driver); |
| } |
| |
| MODULE_DESCRIPTION("National Semiconductor DP83640 PHY driver"); |
| MODULE_AUTHOR("Richard Cochran <richardcochran@gmail.com>"); |
| MODULE_LICENSE("GPL"); |
| |
| module_init(dp83640_init); |
| module_exit(dp83640_exit); |
| |
| static struct mdio_device_id __maybe_unused dp83640_tbl[] = { |
| { DP83640_PHY_ID, 0xfffffff0 }, |
| { } |
| }; |
| |
| MODULE_DEVICE_TABLE(mdio, dp83640_tbl); |